Theorem cusgrres 29434

Description: Restricting a complete simple graph. (Contributed by Alexander van der Vekens, 2-Jan-2018.)

Hypotheses

Ref	Expression
cusgrres.v	⊢ 𝑉 = (Vtx‘𝐺)
cusgrres.e	⊢ 𝐸 = (Edg‘𝐺)
cusgrres.f	⊢ 𝐹 = {𝑒 ∈ 𝐸 ∣ 𝑁 ∉ 𝑒}
cusgrres.s	⊢ 𝑆 = ⟨(𝑉 ∖ {𝑁}), ( I ↾ 𝐹)⟩

Assertion

Ref	Expression
cusgrres	⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → 𝑆 ∈ ComplUSGraph)

Distinct variable groups:   𝑒,𝐸   𝑒,𝐺   𝑒,𝑁   𝑒,𝑉

Allowed substitution hints:   𝑆(𝑒)   𝐹(𝑒)

Proof of Theorem cusgrres

Dummy variables 𝑛 𝑣 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		cusgrusgr 29404	. . 3 ⊢ (𝐺 ∈ ComplUSGraph → 𝐺 ∈ USGraph)
2		cusgrres.v	. . . 4 ⊢ 𝑉 = (Vtx‘𝐺)
3		cusgrres.e	. . . 4 ⊢ 𝐸 = (Edg‘𝐺)
4		cusgrres.f	. . . 4 ⊢ 𝐹 = {𝑒 ∈ 𝐸 ∣ 𝑁 ∉ 𝑒}
5		cusgrres.s	. . . 4 ⊢ 𝑆 = ⟨(𝑉 ∖ {𝑁}), ( I ↾ 𝐹)⟩
6	2, 3, 4, 5	usgrres1 29300	. . 3 ⊢ ((𝐺 ∈ USGraph ∧ 𝑁 ∈ 𝑉) → 𝑆 ∈ USGraph)
7	1, 6	sylan 580	. 2 ⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → 𝑆 ∈ USGraph)
8		iscusgr 29403	. . . 4 ⊢ (𝐺 ∈ ComplUSGraph ↔ (𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph))
9		usgrupgr 29170	. . . . . . . . 9 ⊢ (𝐺 ∈ USGraph → 𝐺 ∈ UPGraph)
10	9	adantr 480	. . . . . . . 8 ⊢ ((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) → 𝐺 ∈ UPGraph)
11	10	anim1i 615	. . . . . . 7 ⊢ (((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) ∧ 𝑁 ∈ 𝑉) → (𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉))
12	11	anim1i 615	. . . . . 6 ⊢ ((((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) ∧ 𝑁 ∈ 𝑉) ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → ((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})))
13	2	iscplgr 29400	. . . . . . . . 9 ⊢ (𝐺 ∈ USGraph → (𝐺 ∈ ComplGraph ↔ ∀𝑛 ∈ 𝑉 𝑛 ∈ (UnivVtx‘𝐺)))
14		eldifi 4080	. . . . . . . . . . . . 13 ⊢ (𝑣 ∈ (𝑉 ∖ {𝑁}) → 𝑣 ∈ 𝑉)
15	14	ad2antll 729	. . . . . . . . . . . 12 ⊢ ((𝐺 ∈ USGraph ∧ (𝑁 ∈ 𝑉 ∧ 𝑣 ∈ (𝑉 ∖ {𝑁}))) → 𝑣 ∈ 𝑉)
16		eleq1w 2814	. . . . . . . . . . . . 13 ⊢ (𝑛 = 𝑣 → (𝑛 ∈ (UnivVtx‘𝐺) ↔ 𝑣 ∈ (UnivVtx‘𝐺)))
17	16	rspcv 3568	. . . . . . . . . . . 12 ⊢ (𝑣 ∈ 𝑉 → (∀𝑛 ∈ 𝑉 𝑛 ∈ (UnivVtx‘𝐺) → 𝑣 ∈ (UnivVtx‘𝐺)))
18	15, 17	syl 17	. . . . . . . . . . 11 ⊢ ((𝐺 ∈ USGraph ∧ (𝑁 ∈ 𝑉 ∧ 𝑣 ∈ (𝑉 ∖ {𝑁}))) → (∀𝑛 ∈ 𝑉 𝑛 ∈ (UnivVtx‘𝐺) → 𝑣 ∈ (UnivVtx‘𝐺)))
19	18	ex 412	. . . . . . . . . 10 ⊢ (𝐺 ∈ USGraph → ((𝑁 ∈ 𝑉 ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → (∀𝑛 ∈ 𝑉 𝑛 ∈ (UnivVtx‘𝐺) → 𝑣 ∈ (UnivVtx‘𝐺))))
20	19	com23 86	. . . . . . . . 9 ⊢ (𝐺 ∈ USGraph → (∀𝑛 ∈ 𝑉 𝑛 ∈ (UnivVtx‘𝐺) → ((𝑁 ∈ 𝑉 ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → 𝑣 ∈ (UnivVtx‘𝐺))))
21	13, 20	sylbid 240	. . . . . . . 8 ⊢ (𝐺 ∈ USGraph → (𝐺 ∈ ComplGraph → ((𝑁 ∈ 𝑉 ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → 𝑣 ∈ (UnivVtx‘𝐺))))
22	21	imp 406	. . . . . . 7 ⊢ ((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) → ((𝑁 ∈ 𝑉 ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → 𝑣 ∈ (UnivVtx‘𝐺)))
23	22	impl 455	. . . . . 6 ⊢ ((((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) ∧ 𝑁 ∈ 𝑉) ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → 𝑣 ∈ (UnivVtx‘𝐺))
24	2, 3, 4, 5	uvtxupgrres 29393	. . . . . 6 ⊢ (((𝐺 ∈ UPGraph ∧ 𝑁 ∈ 𝑉) ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → (𝑣 ∈ (UnivVtx‘𝐺) → 𝑣 ∈ (UnivVtx‘𝑆)))
25	12, 23, 24	sylc 65	. . . . 5 ⊢ ((((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) ∧ 𝑁 ∈ 𝑉) ∧ 𝑣 ∈ (𝑉 ∖ {𝑁})) → 𝑣 ∈ (UnivVtx‘𝑆))
26	25	ralrimiva 3124	. . . 4 ⊢ (((𝐺 ∈ USGraph ∧ 𝐺 ∈ ComplGraph) ∧ 𝑁 ∈ 𝑉) → ∀𝑣 ∈ (𝑉 ∖ {𝑁})𝑣 ∈ (UnivVtx‘𝑆))
27	8, 26	sylanb 581	. . 3 ⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → ∀𝑣 ∈ (𝑉 ∖ {𝑁})𝑣 ∈ (UnivVtx‘𝑆))
28		opex 5407	. . . . 5 ⊢ ⟨(𝑉 ∖ {𝑁}), ( I ↾ 𝐹)⟩ ∈ V
29	5, 28	eqeltri 2827	. . . 4 ⊢ 𝑆 ∈ V
30	2, 3, 4, 5	upgrres1lem2 29296	. . . . . 6 ⊢ (Vtx‘𝑆) = (𝑉 ∖ {𝑁})
31	30	eqcomi 2740	. . . . 5 ⊢ (𝑉 ∖ {𝑁}) = (Vtx‘𝑆)
32	31	iscplgr 29400	. . . 4 ⊢ (𝑆 ∈ V → (𝑆 ∈ ComplGraph ↔ ∀𝑣 ∈ (𝑉 ∖ {𝑁})𝑣 ∈ (UnivVtx‘𝑆)))
33	29, 32	mp1i 13	. . 3 ⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → (𝑆 ∈ ComplGraph ↔ ∀𝑣 ∈ (𝑉 ∖ {𝑁})𝑣 ∈ (UnivVtx‘𝑆)))
34	27, 33	mpbird 257	. 2 ⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → 𝑆 ∈ ComplGraph)
35		iscusgr 29403	. 2 ⊢ (𝑆 ∈ ComplUSGraph ↔ (𝑆 ∈ USGraph ∧ 𝑆 ∈ ComplGraph))
36	7, 34, 35	sylanbrc 583	1 ⊢ ((𝐺 ∈ ComplUSGraph ∧ 𝑁 ∈ 𝑉) → 𝑆 ∈ ComplUSGraph)

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   = wceq 1541   ∈ wcel 2111   ∉ wnel 3032  ∀wral 3047  {crab 3395  Vcvv 3436   ∖ cdif 3894  {csn 4575  ⟨cop 4581   I cid 5513   ↾ cres 5621  ‘cfv 6487  Vtxcvtx 28981  Edgcedg 29032  UPGraphcupgr 29065  USGraphcusgr 29134  UnivVtxcuvtx 29370  ComplGraphccplgr 29394  ComplUSGraphccusgr 29395

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2113  ax-9 2121  ax-10 2144  ax-11 2160  ax-12 2180  ax-ext 2703  ax-sep 5236  ax-nul 5246  ax-pow 5305  ax-pr 5372  ax-un 7674  ax-cnex 11068  ax-resscn 11069  ax-1cn 11070  ax-icn 11071  ax-addcl 11072  ax-addrcl 11073  ax-mulcl 11074  ax-mulrcl 11075  ax-mulcom 11076  ax-addass 11077  ax-mulass 11078  ax-distr 11079  ax-i2m1 11080  ax-1ne0 11081  ax-1rid 11082  ax-rnegex 11083  ax-rrecex 11084  ax-cnre 11085  ax-pre-lttri 11086  ax-pre-lttrn 11087  ax-pre-ltadd 11088  ax-pre-mulgt0 11089

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2535  df-eu 2564  df-clab 2710  df-cleq 2723  df-clel 2806  df-nfc 2881  df-ne 2929  df-nel 3033  df-ral 3048  df-rex 3057  df-reu 3347  df-rab 3396  df-v 3438  df-sbc 3737  df-csb 3846  df-dif 3900  df-un 3902  df-in 3904  df-ss 3914  df-pss 3917  df-nul 4283  df-if 4475  df-pw 4551  df-sn 4576  df-pr 4578  df-op 4582  df-uni 4859  df-int 4898  df-iun 4943  df-br 5094  df-opab 5156  df-mpt 5175  df-tr 5201  df-id 5514  df-eprel 5519  df-po 5527  df-so 5528  df-fr 5572  df-we 5574  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-pred 6254  df-ord 6315  df-on 6316  df-lim 6317  df-suc 6318  df-iota 6443  df-fun 6489  df-fn 6490  df-f 6491  df-f1 6492  df-fo 6493  df-f1o 6494  df-fv 6495  df-riota 7309  df-ov 7355  df-oprab 7356  df-mpo 7357  df-om 7803  df-1st 7927  df-2nd 7928  df-frecs 8217  df-wrecs 8248  df-recs 8297  df-rdg 8335  df-1o 8391  df-2o 8392  df-oadd 8395  df-er 8628  df-en 8876  df-dom 8877  df-sdom 8878  df-fin 8879  df-dju 9800  df-card 9838  df-pnf 11154  df-mnf 11155  df-xr 11156  df-ltxr 11157  df-le 11158  df-sub 11352  df-neg 11353  df-nn 12132  df-2 12194  df-n0 12388  df-xnn0 12461  df-z 12475  df-uz 12739  df-fz 13414  df-hash 14244  df-vtx 28983  df-iedg 28984  df-edg 29033  df-uhgr 29043  df-upgr 29067  df-umgr 29068  df-uspgr 29135  df-usgr 29136  df-nbgr 29318  df-uvtx 29371  df-cplgr 29396  df-cusgr 29397

This theorem is referenced by:  cusgrsize  29440